A hydrogel is a system of polymer chains that are hydrophilic, at times found as a colloidal gel in which water is the scattering medium. A three-dimensional strong outcomes from the hydrophilic polymer chains being held together by cross-links.[clarification needed] Because of the inalienable cross-interfaces, the basic honesty of the hydrogel organize doesn break up from the high centralization of water.Hydrogels are profoundly spongy (they can contain over 90% water) common or manufactured polymeric systems.